Information processing apparatus, distributed processing system, and distributed processing method

An information processing apparatus comprising:na memory; anda processor that is coupled to the memory and executes a process comprising:receiving a query as to whether data is stored in a page cache managed by an operating system, from an information processing apparatus that has received an access request for data from one of a plurality of information processing apparatuses in a distributed processing system in which the information processing apparatuses execute a process in a distributed manner;referring, when the query is received at the receiving, to a page cache managed by an operating system in the information processing apparatus;determining whether the data is stored in the page cache managed by the operating system; andresponding to the received query by sending a result determined at the determining, whereinthe determining includes calculating a total number of pages from a size of the data, and, when a ratio of the total number of pages to a number of pages stored in the page cache managed by the operating system in the information processing apparatus is equal to or greater than a predetermined value, determining that the data is stored in the page cache managed by the operating system.

A non-transitory computer readable storage medium having stored therein a cache management program causing a computer to execute a process comprising:nreceiving a query as to whether data is stored in a page cache managed by an operating system, from a computer that has received an access request for data from one of a plurality of computers in a distributed processing system in which the computers execute a process in a distributed manner;referring to a page cache managed by an operating system in the computer and determining whether the data is stored in the page cache managed by the operating system; andresponding to the received query by sending a result determined at the determining, whereinthe determining includes calculating a total number of pages from a size of the data, and, when a ratio of the total number of pages to a number of pages stored in the page cache managed by the operating system in the computer is equal to or greater than a predetermined value, determining that the data is stored in the page cache managed by the operating system.